This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 2 |
| 3 | 1 |
| 4 | 4 |
| 5 | 10 |
| 6 | 12 |
| 7 | 36 |
| 8 | 64 |
| 9 | 120 |
| 10 | 272 |
| 11 | 496 |
| 12 | 1024 |
| 13 | 2080 |
| 14 | 4032 |
| 15 | 8256 |
| 16 | 16384 |
| 17 | 32640 |
| 18 | 65792 |
| 19 | 130816 |
| 20 | 262144 |
| 21 | 524800 |
| 22 | 1047552 |
| 23 | 2098176 |
| 24 | 4194304 |